There. I fixed the zaxxon pinout. one of the plates is always on and I screwed up the numbering so now that should be fixed.

here's pair match. It's got dual HD38820's. should be fun. one wrinkle is one of the chips can reset the other, so keep that in mind. I put both pinouts on one spreadsheet. The one CPU literally only has a single output to the feeper not counting the "feedback" between it to the main CPU.

I updated the file in the zaxxon directory so redownload it to get the fixed version.